5661568991232 has 1496 divisors, whose sum is σ = 22289955231360. Its totient is φ = 1393140695040.

The previous prime is 5661568991209. The next prime is 5661568991233. The reversal of 5661568991232 is 2321998651665.

5661568991232 is a `hidden beast` number, since 5 + 6 + 61 + 568 + 9 + 9 + 1 + 2 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 5661568991232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661568991233) by changing a digit.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 297977315319 + ... + 297977315337.

Almost surely, 2^{5661568991232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661568991232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11144977615680).

5661568991232 is an abundant number, since it is smaller than the sum of its proper divisors (16628386240128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661568991232 is an frugal number, since it uses more digits than its factorization.

5661568991232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 42 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 63.

The spelling of 5661568991232 in words is "five trillion, six hundred sixty-one billion, five hundred sixty-eight million, nine hundred ninety-one thousand, two hundred thirty-two".